Machine for descaling boilers



MACHINE FOR DESCALINGJBQILERS Filed Dec. 27, 1927 2 Sheets- Sheet l jflficlazb/r a v TTORNEY. v

and, has for its object to improve my ma-.

' casing in side elevation.

Patented May 6, 1930 UNITED STATES PATENT OFFICE FREDERICK L. SCHLEICHER, ST. LOIJ'IS, MISSOURI, 'ASSIGNOR TO SCHLEICHER- CORPORATION, OF WILMINGTON, DELAWARE, -A CORPORATION OF MACHINE IOR DESCALING BOILERS Application filed'llecember 27, 1927. Serial No. 242,551.

My invention relates to machines that produce by abrasiona'finely divided metall c material that will remain in suspension 1n the feed water being pumpedinto a boiler,

chine for the same purpose filed in the United States Patent Office on the 4th day of October, 1926, and bearing Serial Number 139,- 542, first, by providing an abradant rotor which is suspended in thewater-chamber of the casing of thelmachine, and, second by providing abrasive brushes for contact :with the rotor'having connections of the same ma terial for pivotal connection with support-- ing pins, so that the body of each abrasive brush can be completely worn down and. automatically severed, from its connections by abrasion, thus leaving nothing but the connections to be removed when applying new brushes to the machine.

A further object of the invention isthe provision'of a machine, which possesses advantages Iin points of simplicity and efficiency, and, atvthe same time'proves itself comparatively inexpensive in :cost of manufacture. I 1 v r e With the above and other objects in view, the invention consists in the novel-features of construction, arrangement and combination of parts hereinafter more fully described and finally pointed out in the claims hereto appended.

Referring to the accompanying drawings forming a part of this specification, wherein like characters of reference denote similar parts throughout the several views:

Fig. 1, is a top plan view of themachine with the cover plate and parts carried thereby removed from the casing and with apart of the casing shown in sectional elevation.

Fig. 2, is a vertical sectional'view of the casing, with the cover plate and parts carried thereby removed and showing the abrading rotor and the brushes within the 'Fig. 3, is a vertical sectional elevation of the machine.

Fig. 4, is a detail lD'VeIfiCal sectional ele- .vation of the abrading rotor, a -partof the cover plat and the bevel ge r. .7

the boiler, preferably tion pump, not shown.

Fig.5, is a top plan view of the machine. In carryingout the aim of 'mypresent invention, I employ a suitable casing 1 having an open top which is closed by means of a suitable closure plate 2 to provide a water and abrading chamber 3. The cover plate-2 is secured to the wall of the casing by means of suitable fasteningdevices 4. The side wall of casing 1 is provided'with a pair of opposed openings 5 and 6 which communicate with the'water chamber 3. One of said openings is a water inlet opening and the other opening is a water outlet opening. The casing 1 is connected in the water feed line to in advance ofthe suc- As clearly shown in Fig. and in detail in Fig. 4, a'sleeve member 7 of suitable bearing material having a reduced screw threaded upper end to provide a 'nlpple 8 and shoulder 9 depends from the cover plate 2' centrally thereof. The sleeve member. 7 is connected to the cover plate 2 by means of the nipple 8'which is received by a central screw threaded opening 10in the cover plate 2 and with the shoulder 9 of the sleeve member engaging the lower face of the cover plate 2 to limit upward movement of the'sleeve member relative to the cover plate.

The sleeve 7 is provided with a bore of two diameters designated 11 and 12s0 as to provide an upper bearing section 13 and a packing chamber 14.

A driven shaft 15 is mounted in the bear-v ing section 13 of sleeve 7 and passes downwardly to the lower end of the packing chamber 14. The packing chamber 14 isadapted to receive a suitable packing material 16 backed by a bearing sleeve 17 which also acts as a packing gland and which is held in the desired contact with the packing by means ofa plug 18 having screw threaded engagement with-the lower end of the bearing sleeve 7 which permits of-tightening the packing 16 .when necessary. The plug '18is provided'in its outer face with a slot 19 for recelving a convenient tool for turning the screw plug 18. The upper end of the driven shaft 15 is reduced in diameter to provide a shoulder 20 and the reduced upper extension 21 which extends upwandly'beyond the' pper fa e of the Eli through the ball bearing and the lower face 27 of the gear 23 engages the upper face of the ball bearing 26. as clearly shownin Fig. 4. The bevel gear 23 and the ball bearing 26 are both disposed within a housing 28 forming a part of the cover plate 2 and which housing is provided with the chamber 29 for receiving a lubricant forthe gear and the ball bearing, as clearly shownin Fig. 3. 'The housing is provided with a removable coverp'late3O for gaining access to the parts within the chamber-29 and for filling the chamber with lubricant.-

Thelower end of the driven shaft 15 is reduced in diameter to provide a shoulder 31 and the reduced lower extension 32 which extends downwardly beyond the lower face of the sleevemember 7 to receive the hub section33 of a head member 34. Thehead mem: ber 34 is connected to the extension 32 of the shaft 15 by means of a suitable key 35 and locked thereto by means of a nut 36 carried by the lower end of the lower reduced extension 32 ofthe shaft 15 and which nutengages the lower face of the head member 34.

' Surrounding the sleeve member 7 is a cylindrical member 37 having a reduced bore 38 at its upper end to receive a suitable'oilless bearing 39 which is disposed between the sleeve member 7 and the cylindrical member 37. The cylindrical member 37i's provided with an upper laterally directed flange 40 and a lower laterally direct-ed flange 41, both'of which are of the same diameter and to which is applied a suitable abradant cylinder 42.

The abradant member 42 is secured to the flanges 40 and 41 by shrinking the same thereon so that it will be held thereon against displacement. The abradant cylinder 42 extends downwardly a little beyond the lower flange 41 so as to provide a recess 43 to receive head member 34, the lower face of which lies flush with the lower face of the abradant cylinder 42. The cylindrical member 37 is secured to the head member 34'by meansof suitable fastening devices, such for instance as screws 44 which have connection withthe lower flange 41, so that when the shaft 15 is rotated the motion is imparted to the cylindrical member 37 and the abradant'cylinder 42 which is carried by the cylindrical member 37. A pinion 45 carried attheinner end 7 of ash'aft46 which has a'flexible connection 47 with the drive shaft 48 offa suitable electrie motor 49, which motor: is shownfor convenience in conventional form and as carried by a supporting shelf 50 forming a part of the cover plate 2, so that when the cover plate 2 is removed from the casing 1, the motor need not be disconnected from its supporting shelf 50. The cover plate 2 is provided upon the side opposite the shelf'50 with a suitable handle extension 51 so that the cover 2 may be lifted from the casing 1 by means of the shelf 50 and the handleextension 51. i

A plurality ofvertica'lly disposed studs 52 are suitably connected at their lower ends to bosses 53 on the lower wall of the casing 1 and the studs are arranged in equal spaced relation within the chamber 3 of the casing 1 and surround the rotatable abradant cylinder 42. The spacedapartrears 54 of cast metallic brushes 55 that are to be abraded by the abradant cylinder 42 to form a suspended material to be fed to the feed water entering a boiler are journaled on the studs 52. There isonel brush to each stud and the brushes 55 and their spaced cars 54 are made of the same material sothat the brushes 55 can be completely worn down by abrasionleaving nothmg but the ears 54 which are severed by abrasion from the brushes. The brushes 55 are normally held in engagement with the vertically disposed rotary abradant cylinder 42 by means of suitable'springs 56 coiled around the studs 52'. each having an end 57 hearing against the upper of the two-ears 54 0f each brush 55 and clamping over the same, and the other end 58 bearing' against a respective pin 59. The pins 59 are suitably connectedto the bosses 53 on thelower wall of the casing land are disposed adjacent each stud 52, as clearly shown in Fig. 1.

- There can be nojam'ining of the abraolable brushes 55 with the'rotatable abradant cylinder 42, or in the water chamber 3 of the casing '1, as the brushes 55 are pivotally supportedin equals'paced relation to each other and are not free to any otherm'ovement than pivotal movement as they are being abraded.

The abrading action on the brushes 55-is con- V tinuous as long as there is any body left to be abraded asthe abradant cylinder isrotated continuously by means of the electric motor.

The many advantages of the herein described invention will readily suggest themselves to those skilled in the art to which it appertains.

From the foregoing description, it is evident that a simple device for this purpose has beendisclosed, but itis to be understood that I do. not desire to restrict, or limit myself to-the very details of the construction shown and described, which .is merely illus- 'trative, itfbemgobvious that changes, not involving the exercise of invention maybe made without conflicting or departingifrom the: spirit of the invention wit 'iri the-scope of the appended claims aended state a casin havin osed water l 7 c a:

What I claim is: 1. In a device for abrading material to be supplied to feed water to a boiler in a susinlet and outlet openings, a'rotatable abradant cylinder suspended from the top wall of the casing and free of contact with the opposite wall of the casing, a plurality of horizontally disposed pivotally supported brushes of descaling material to be abraded by contacting with theside wall of the vertically disposed cylinder and resilient means for progressively feeding the brushes to the wall of the cylinder. i i

2. In a device of the class described, a casing having a water chamber provided with an inlet opening and anoutlet 0pening, aremovable cover plate for the casing, a bearing sleeve fixed to and suspended from said cover I plate, a shaft passing through said sleeve, a packing surrounding said shaft and disposed within said sleeve, a movable combined bearing sleeve and packing gland. within said sleeve and surrounding said shaft, a'sc'rew threaded plug carried at the lower end of the bearing sleeve for contact with said combined sleeve bearing and packing flanged cylindrical member surrounding said bearing sleeve, an oilless bearing disposed between said cylindrical member and said bearing sleeve, an abradant cylinder carried by said flanged cylindrical member, a head member secured to the lower end of said shaft, means for securing said cylindrical member to said head member, a bevel gear secured to the upper end of said shaft, a ball bearing disposed between said bevel gear and. the cover plate, a housing forming a part of the cover plate for housing said gear and ball bearing and for containing lubricant, a driving shaft extending into said housing and a pinion carried by said driving shaft meshing with said bevel gear for imparting rotary movement to the abradant cylinder.

3. In a device of the class described, a casing having a water chamber provided with an inlet and an outlet, a rotatable ab-radant cyl- V inder, brushes of descaling material, spaced ears directed from said brushes of the same material as the brushes, studs carried by the casing upon which the ears of said brushes are journaled, a pin adjacent each stud, coiled springs mounted on said studs-each having one end bearing against its respective pin and the other end thereof bearing against one of the ears of each brush to normally and frictionally contact the brushes with the rotary abradant cylinder.

4. An abradant rotor for machines of the class described, a bearing sleeve fixed to and suspended from a support, a shaft passing through said sleeve, a packmg surrounding sleeve, a I

said shaft and disposed Within said movable'combined bearing sleeve and packgland, a

ing gland Within said sleeve and surrounding said shaft,a screw threaded plug carried head member.

5. A brush for abrading machines ofthe class described comprising a body of descalin material to be abraded and a pair of spaced ears directedfrom said body adapted to be journals-d upon supports for swinging movement, said ears being of the same material as the body so that the entire body can be severed fromthe ears'by abrasion.

6. In a device of the class described, in combination a casing having a water inlet and a water outlet in diametrically oppositerelation, a removable cover for said casing, a vertically disposed abradant cylinder suspended from the cover and removable from within the casing with the cover, a plurality of horizontally disposed abradable brushes of boiler descaling material pivotally supported for progressive arcuate movement into abrading contact with theouter surface of if the ab-radant cylinder, said abradable brushes be ng arranged in opposed relation and diagonall arran ed relativetothe ivot oints of the abradable brushes and means supported by the cover and removable therewith for rotating the aforesaid abradant-cylinder.

7., lnadevice for abrading material to be supplied to feed water to a boiler in a suspended state, a casing, a cover for said casing, a rotatable abradant cylinder suspended in a vertical position within the casing from the cover of the'casing and free of contact with the bottom wall of the casing,'horizon.

tally disposed pivotallysupported brushes of boiler descaling material adapted for abrading contact with the side wall of the vertically suspended abradant cylinder, resilient means for progressively feeding the brushes to the side wall of the abradant cylinder, the said brushes each adapted .to be completely submerged in water passingthrough the casing as they are abraded. r

In testimony whereof, I have hereunto af fixed my signature.

rnnnnuicr: L. scHLE oHER; 

